Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

[karo-tx-linux.git] / include / linux / mm.h

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7cb17c6b97de38b1e8d55ca6d8c90b8415a9c3fa..b892e95d4929d311b51877dfb9eb3de67780bbdf 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2327,6 +2327,17 @@ static inline struct page *follow_page(struct vm_area_struct *vma,
 #define FOLL_REMOTE    0x2000  /* we are working on non-current tsk/mm */
 #define FOLL_COW       0x4000  /* internal GUP flag */
 
+static inline int vm_fault_to_errno(int vm_fault, int foll_flags)
+{
+       if (vm_fault & VM_FAULT_OOM)
+               return -ENOMEM;
+       if (vm_fault & (VM_FAULT_HWPOISON | VM_FAULT_HWPOISON_LARGE))
+               return (foll_flags & FOLL_HWPOISON) ? -EHWPOISON : -EFAULT;
+       if (vm_fault & (VM_FAULT_SIGBUS | VM_FAULT_SIGSEGV))
+               return -EFAULT;
+       return 0;
+}
+
 typedef int (*pte_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
                        void *data);
 extern int apply_to_page_range(struct mm_struct *mm, unsigned long address,